【摘要】 借助商用有限元分析软件ABAQUS,考虑材料本构关系的非线性以及受力过程中材料Poisson比的变化等因素,建立了方钢管混凝土短柱在轴心压力作用下的非线性有限元计算模型,讨论了钢管与核心混凝土之间的接触压力、荷载对核心混凝土纵向应力分布的影响以及钢管对核心混凝土的约束效应等问题。有限元计算得到的载荷-变形全曲线与试验结果符合较好。更多还原

【Abstract】 Finite element models for axially-loaded square CFT (concrete-filled steel tube) columns were proposed using the program ABAQUS. The effects of material nonlinear constitutive relationship and the variation of Poisson’s ratio under loading were taken into account. The contact pressure between the tube and the core concrete, the axial stress distribution of the core concrete under loading and the constraint of the tube to the core concrete were analyzed. The load-deformation curves of the axially loaded square CFT short columns were obtained, which agreed well with experimental data.更多还原